Dental suction-disk.



N. COHEN.

DENTAL SUCTION DISK APPLICATION FILED OCT. 5, 1915.

- Patented O0t.16,1917.

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pnrrn rrns riser oasis.

NATHAN COHEN, OF SWINDON, ENGLAND,-ASSIGNOR OF ONE-HALF T0 FRANK -BOWER1VIAN, OF SWINDON,.EN GLAND.

DENTAL SUCTION-DISK.

Application filed October 5,

To all whom it may concern:

Be it known that I, NATHAN COHEN, a subject of the King of Great Britain, residing in Swindon, in the county of Wiltshire, England, have invented certain new and useful Improvements in Dental Suction- Disks, of which the following is a specification.

This invention relates to improvements in dental suction disks of soft rubber. As distinguished from known disks of this type, a disk made in accordance with the present invention is formed upon a soft metal mold upon which it is partly vulcanized; the disk together with the mold thereon being issued to the dentist ready for application to the denture in the ordinary manner. The softmetal mold serves to protect the disk and facilitates its application to the denture, being removed after the vulcanization of the denture has been effected.

In the accompanying drawings:

Figure 1 is a top plan view of one form of suction made according to this invention, designed for use upon an upper denture.

Fig. 2 is a section thereof on the line 22 of Fig. 1.

Fig. 3, is a top plan view of a form of suction designed for use upon a lower denture.

Fig. 4, is a section of the structure shown in Fig. 3 taken on the line H thereof.

Fig. 5, is a bottom plan view of a lower denture showing my improved form of soft suctions therein; and

Fig. 6, is an enlarged sectional View, showing such suction shown in Fig. 5 in position in the denture preparatory to vulcanizing said denture thereto.

Referring to the accompanying drawings, a indicates a suction disk designed for use upon an upper denture, and which comprises a disk the surface of which contacting with the palate has upon it a series of oval or approximately oval projections or walls 6 b 6 whereby there is formed, when the denture is applied to the palate, an air chamber represented by the space 0 between the aforesaid walls I) b and cups represented by the spaces 0 0' between the wall 6 and the space inclosed by the wall 6 As will be readily understood, when the suction is applied to the denture in order Specification of LettersPatent.

1915. Seria1No.54,166.

that it may conform to the outline of the surface of said denture, the said suction is given acurved outline. The bending of the suction causes the adjacent surfaces of the above mentioned walls to incline one toward the other whereby there is produced an undercut effect, and the sectional outline of the spaces between the walls is of substantially dove-tailed outline. Consequently when the suction is applied to the mouth and the chambers are evacuated, the soft tissues of the palate or gums as the case may be are drawn into the dove-tailed shaped chambers and a firm adhesion of the denture secured.

The suction is produced by means of a metal mold x and it is partly vulcanized before application to the denture, the suctions as prepared for use by the dentist having said mold 00 left thereon. v

In use the suction is placed upon the mold and the denture then packed in the usual manner and then vulcanized. The metal mold a? is then removed leaving the suction embedded in and firmly adherent to the denture, the said suction, however, being of much softer rubber than the denture, whereby not only is a much better adhesion obtained but the comfort of the user of the denture is considerably enhanced.

The metal cup or shield is preferably of some soft material, aluminium for example, so that it and the suction may be readily bent to the desired outline.

As applied to a lower denture (Z I prefer to employ a disk of elongated outline, such as that al shown in Figs. 2 to 6 of the drawings, in which case there is provided a peripheral wall d and two approximately oval additional walls 0 6 arranged with their axes upon the larger axis of the disk, forming air chambers at f f and a cup 7.

The application of the suction to the lower denture causes the walls of the cups and chambers to incline one toward the other as previously described in connection with the upper denture.

Obviously, the outline of the disk as also that of the walls and the number of the said walls may be varied as desired.

I claim:

A denture of lower teeth, formed of substantially hard material and having an imperforate-curved recessed channel portion;

suction-members of relatively softer mate- In Witness whereof I have hereunto signed rial than the material forming the denture my name in the presence of two Wit located on either side within the channel, nesses.

and suction cups formed integral with the NATHAN COHEN base of such suction-member, the back walls Witnesses or bases of such suction-members being'im- I JOHN H. JACK,

perforate. EDMUND H. HARBERD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, t 1 l v Washington, D. 0." I 

